HiLetgo RDM6300 125kHz EM4100 RFID Card Read Module with UART Serial Output for Arduino Review

Bought three all broken or dead. Arrived with pins stuck in static white foam. I don't understand why so many of these items are not packed at the factory with proper ESD precautions.

Set up and running in about 5 minutes after I found the Arduino library and code. Check out arduino dot cc for RDM630 library. I will try to connect it to the 8266 to connect wirelessly to my projects. Absolutely cool.

Didn't quite work for what I intended (reading animal tags) but works as intended. The only problem is that the antenna is not windproof and can be damaged very easily (small bends even in a mess with the field). I was able to stabilize and protect it a bit by mounting it on a small circuit board.

I bought this to test the ability to read multiple tags simultaneously within range of the antenna. Failed the test. It may be possible to read multiple tags without special built-in random delay hardware, but this reader cannot. Otherwise it worked perfectly when first plugged in. The output data has a serial speed of 9600 baud. The 0x02 byte follows the ASCII digit string, followed by 0x03 to end the string. If you keep the label within reach, only the ID will be retransmitted. This…

I bought this to connect with my Arduino and a relay to open and close the door of my garage. This reader transmits the chip ID as long as it is within the detection range. I had a hard time creating logic commands based on it because the data comes in very quickly every time the program loops. I managed to edit the Arduino RDM630 library by adding rfid.end(); The command I use to stop the data after getting the ID of the symbol I'm using to grant access. After my code completes, it opens the…

Connected and started fairly quickly. I found several libraries on the internet. There was no RFID tag in the kit and the first ones I bought are not compatible. Apparently 125kHz is not enough, it needs to be compatible with the EM4100. It worked when I had the right tag. The only other RFID reader I've used and compared to is the RC522. Their sensitivity seemed about the same at a distance of about an inch. With one library I tried to output the value continuously while the tag was in scope…

Didn't quite work for what I intended (reading pet tags) but works as intended. The only problem is that the antenna is not windproof and can be damaged very easily (small bends even in a mess with the field). I was able to stabilize and protect it a bit by mounting it on a small circuit board.